Substituted cyclopentadiene electron transport compounds
US5103038A · kind A · utility
13Cited by
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3Claims
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Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel tetrasubstituted dicyanomethylene cyclopentadienes are provided which have utility as electron-transport agents in positively-charged electrophotographic elements. The compounds are characterized by the formula: ##STR1## wherein: R.sub.1 and R.sub.4 are each independently selected from the group consisting of lower alkyl, halogen and cyano; PA1 R.sub.2 and R.sub.3 are each independently selected from the group consisting of aryl and substituted aryl; and PA1 Z and Z' are each an electron withdrawing group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.